Thomas price



T. PRICE.

FURNACE GRATE.

J APPLICATION FILED MAYI, 1919. Patented Dec. 23,1919.

2 SHEETSSHEET I.

INVENTOR 'honmlb'ice.

' ATTORNE 5 mHo es PRICE, r011 NaNAIMo, Bai'HsEcQLuMBIA, GANADA.

Sneeifi etioei et e s Retest Pa eat d Rec- .1. 5, 9119- Application filed may 7, 1919 serial o all whe it may 1 1 1:

if, lgnbwn that 1, T1 (j As PRICE, a citizen of the Dominion of Canada, fe'siding at Naha'imo, inthe Province of British C0- lll i liia, Canada; have intehted certain new and"useifuh lmp bvements" Furnace eaes f which the leivi g e specie camber" This invention relates to a selfcleaning meg-eats fol aboilei' furnace o the like whi ih i e Pa u ar y si d, 9 e a le w g de ue e' y jli h P9 ceiitage in ash clinker, tobe usedwlth l ie ie f the. m e a lebe fisue e 'se y keep, he fe' l a en l fii'ie'br T e vent n s pa i l r y s r e in the following specificatioi 'i'efere'nce 'b'eiligmade to'the drawings by which it is accompa iesi, n wh ch:

igure 1' is a plan of a double furnace showing the grate bars and the ofi i fi@n'o 11 operating mechanism to the1alt'einatebars, F gs- 2 and? shew to a en r e sca the rotatable grate bars plan'and i end elevation.

Fig 4 5 shew o a si il r y em r d seer he easemen s we n pen and C Q$S seb iq' E e I is a de ail. Showing th sha on the divided "parts: of which the operative pawl W eel fife eees sd ndepen ent operate the g ate parsoi 'separatebo11e "furn es H Fig, 7 is a sideeleyation and part section ofthefuinace and its operative mechanism. ,"Eig- 8 h ws a ewn Qf h grate bars illustfatihg the alternate barsas 'otatable. Fig; 9 is a sectional face View to aneularged scale of the pawl carrying head of he e a eb e grat b e n Fig. 10 is a face View (and part sectlon on the line 10-10 of Fig. 1) of the mechanisnki by which thepoweris applied to oper-' ate the bars ofa senes of furnaces providfo thevariable movement whlch sepafate boilers may iflequire, the near shaft bearv ing and pawl'carrying plate being removed. Fig. 11 is an edge yiew of the member describ d n F g- 9- A @e e' eewsi e Lee? a? emalie to a brick-lined furnace chamber, the products of cdinbustioii from emana e deliy'ered to the flu'es of a boiler. Whildthisis' pref arab e as affording a3 o oaumty qr mbr'e complete" coin bustiohf it is not an essential requirement as" the grate my'be'a )liedto ny amass anaemia-me eeap 1ieatb" any Purpose where fuffi ace heat is fequified.

" The grate? cqnsists transversely dis;

posed; alte'ifiatef fiXed and fet olving grate bars 2 and 3, The 'endsbjf thsefbarsfare calfried on bearer plates a along eaclf side, which are pi'oiiidedwith seats fer the fixed bats -2 and-half bearings for the revolving bars 3."The fixed bars are of't'heheriingboi'ie type'having 'interspaces acutely angled in opposite directions along-"each edge frq 'n the lengthwise ribs and between" the ribs"the i tei'spaces are disposedaci'o'ss at The fotatable bars 3 are formed with a square amalgam which is -ounded at each end where itseats in" the bar heater; and at one end is produced beyond the bearer bar 4: to pass through the side wall o f'flthe furnace and is squared to receive the mechaby which they are rotated. Intermediate of the bearers 4 each bar 3 has a series of inter-spaced square flanges,

the flats of which correspond with the of'the fiXed bars 2 when in place. On the squared end of each rotatable bar 3"is secured a stag ratchet" wheel'5 and mountediree "on each side of the ratchet wheel and connected together" are plates 6 which carry between them the ratchet pawls 7.-

connecting bar 9 extends along each side of the double furnace, and is connected to a pin 8 secui'ed between the upper ends level of each pair of pawl plates 6 thatthe' plates may be simultaneously oscillated from the ari n 11 of a rocking shaft '10; which mpunted in bearings across one end ofthe furnace chamber. -This rocking shaft 10 thu s' ojscillates the grate bars of both furnaces and isitself oscillated by any suitable means.

Where a battery of boilers is in one installation they are pieferablyarranged in paiisa'nd to enable the condition of the fire (a 'the s'e'veral b oilers'to be separately regulated, the arm 12 of the rocking shaft is connected by a rod 13 to a pin 14 which is adjustable in a radial slot 15 of a crank disk 16. This crank disk is secured on the end of a shaft 17 which is endwise divided and the end of one part socketed in the end of the other, see Fig. 6, that the two parts are independently rotatable.

On each divided part of this shaft 17 is secured a ratchet wheel 18 on which is mounted a pair of plates 19 carrying between them a pawl 20. A check pawl 21 is also mounted in the foundation frame which carries the bearings of the shaft, etc., and prevents rotation backward. To a pin secured between the produced lower ends of the pawl carrying plates 19 of each ratchet wheel 18 is connected a rod 22 from separate eccentrics 23 secured 011 a shaft 24, which shaft is driven by an endless chain 25 over a sprocket wheel 26 from any convenient source of power.

With this mechanism, rotation of the shaft 24 by the chain 25 imparts, by means of the eccentrics 23, an oscillating movement to the pawl carrying plates 19 and through them a periodic rotational movement to each part of the shaft 17 and their crank disks 16. Through the radially adjustable crank pins 14 of these disks, an oscillating movement is imparted for each revolution of the shaft 24, to the rocking shafts 10 of adjacent boilers and therefrom through the connecting bars 9 to the rotatable grate bars 3, imparting to them a periodic, slowly, rotatable movement.

The amount of this movement may be regulated by the position of the pin 14 in the radial slot 15 of the crank disk, but to enable this variation to be made for the furnaces of one boiler, while the mechanism is in motion, and without disturbing that of the others, a pawl fence 30 is adjustable in a curved slot 31 to be circumferentially movable concentric with the ratchet wheel 18. This fence 30 is set close to the ratchet teeth and may be adjusted to lift the pawl from contact with any desired number of teeth while the oscillating plates move through their full movement, the pawl riding the fence over the teeth it is desired to out out.

The effect of therotation of the square flanged grate bar in lifting and lowering the fuel, and at the same time dragging it forward from the fire door, effectually frees that fuel from the dust, which dust falls through the bars, and as the square flanged bars rotate the clinker is free to fall into the ash pit. is in one direction, they are also effective in dragging the clinker from the fixed bars.

Having now particularly described my invention, I hereby declare that what I claim As the movement of the alternate bars as new and desire to be protected in by Letters Patent, is:

1. A furnace grate, comprising the combination with a furnace chamber, of fixed and rotatable grate bars spaced alternately across the chamber, said rotatable bars having rectangular flanges interspaced on a central core, and means for imparting a rotational movement to the alternate bars.

2. A furnace grate, comprising the combi nation with a furnace chamber, of fixed and rotatable grate bars spaced alternately across the chamber, the fixed bars having lengthwise webs with air spaces across between them and acutely angled air spaces from the webs outward to each edge of the bar, and the rotatable bars having square flanges interspaced on a central core, and means for imparting a rotational movement to the alternate bars.

3. A furnace grate, comprising the combination with a furnace chamber, of fixed and rotatable grate bars spaced alternately across the chamber, a ratchet wheel secured on the end of each rotatable bar, a pawl mounted to move concentric with and to engage the teeth of the ratchet wheel, a connecting bar pin-connected to the pawl carrying means of each rotatable grate bar, said rotatable bar having squared flanges interspaced on a central core and means for imparting a reciprocating movement to the connecting bar. 7

4. A furnace grate, comprising the combination with a furnace chamber, of fixed and rotatable grate bars spaced alternately across the chamber, a ratchet wheel secured on the end ofeach rotatable bar, a pawl mounted to move concentric with and to engage .the teeth of the ratchet wheel, a bar pin-connected to the pawl carrying means of each rotatable grate bar, a shaft rotatable at a substantially constant velocity, an eccentric crank pin secured on said shaft, means 7 for connecting the crank pin to pawl carrying plates mounted to move freely concentrically with a second shaft parallel with that on which is the, pin, a ratchet wheel secured on the second shaft between the pawl carrying plates, and a crank with a radially adjust- ,able crank pin secured on the vsecondshaft,

which pin is connected to'the reciprocating rod of the grate bars.

5. A furnace grate, comprising the combination with a furnace chamber, of fixed and rotatable grate bars spaced alternately across the chamber, a ratchet wheel secured on the end of each rotatable bar, a pawl mounted to move concentric with and to engage the teeth of the ratchet wheel, a bar pin-connected to the pawl carrying means of each rotatable grate bar, a shaft rotatable at a substantially constant velocity, an eccentric crank pin secured on said shaft, means for connecting the crank pin to pawl carrying plates mounted on a second shaft parallel to the first named to move concentrically with a ratchet wheel secured on the second shaft, acrank with a radially adjustable pin secured on the second shaft, which pin is connected to reciprocate the connecting rod of the rotatable grate bars, a fence movable concentrically with the ratchet wheel of the second shaft with means for 10' moving the fence circumferentially to interpose it between the pawl and any desired number of teeth of the ratchet wheel.

In testimony whereof I afiix my signature.

THOMAS PRICE. 

